16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Spencer township | 1 | 529 | 565 | -0.94% | 7 | 73.90 | Township |
| Butte township | 2 | 381 | 391 | 0.53% | 6 | 63.74 | Township |
| Spencer | 3 | 371 | 403 | -1.59% | 620 | 0.60 | Village |
| Butte | 4 | 268 | 282 | -1.11% | 570 | 0.47 | Village |
| Lynch township | 5 | 226 | 238 | -0.44% | 6 | 40.67 | Township |
| Basin township | 6 | 210 | 219 | 0% | 2 | 128.66 | Township |
| Lynch | 7 | 181 | 195 | -1.63% | 339 | 0.53 | Village |
| Bristow township | 8 | 98 | 105 | -1.01% | 3 | 32.90 | Township |
| McCulley township | 9 | 93 | 96 | 0% | 2 | 52.95 | Township |
| Morton township | 10 | 90 | 94 | 0% | 2 | 52.44 | Township |
| Naper | 11 | 82 | 89 | -1.2% | 607 | 0.14 | Village |
| Bush township | 12 | 68 | 72 | 0% | 1 | 54.90 | Township |
| Bristow | 13 | 65 | 70 | -1.52% | 399 | 0.16 | Village |
| Anoka | 14 | 10 | 12 | 0% | 18 | 0.56 | Village |
| Gross | 15 | 2 | 2 | 0% | 16 | 0.13 | Village |
| Monowi | 16 | 0 | 0 | 0.00 | 0.21 | Village |
Spencer township is the largest city in Boyd County, with a population of 529.
Monowi is the smallest city in Boyd County.
There are 16 cities in Boyd County, Nebraska.